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- W2897056786 abstract "3D skeleton based human representation for gesture recognition has increasingly attracted attention due to its invariance to camera view and environment dynamics. Existing methods typically utilize absolute coordinate to present human motion features. However, gestures are independent of the performer’s locations, and the features should be invariant to the body size of performer. Moreover, temporal dynamics can significantly distort the distance metric when comparing and identifying gestures. In this paper, we represent each skeleton as a point in the product space of special orthogonal group SO3, which explicitly models the 3D geometric relationships between body parts. Then, a gesture skeletal sequence can be characterized by a trajectory on a Riemannian manifold. Next, we generalize the transported square-root vector field to obtain a re-parametrization invariant metric on the product space of SO(3), therefore, the goal of comparing trajectories in a time-warping invariant manner is realized. Furthermore, we present a sparse coding of skeletal trajectories by explicitly considering the labeling information with each atoms to enforce the discriminant validity of dictionary. Experimental results demonstrate that proposed method has achieved state-of-the-art performance on three challenging benchmarks for gesture recognition." @default.
- W2897056786 created "2018-10-26" @default.
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- W2897056786 date "2018-12-08" @default.
- W2897056786 modified "2023-10-14" @default.
- W2897056786 title "3D Skeletal Gesture Recognition via Sparse Coding of Time-Warping Invariant Riemannian Trajectories" @default.
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- W2897056786 doi "https://doi.org/10.1007/978-3-030-05710-7_56" @default.
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